Reversible rotary pump



April 1951 L. SHANNON 2,549,714

REVERSIBLE ROTARY PUMP Filed Nov. 15, 1946 2 Sheets-Sheet l ATTD RN EYS April 17, 1951 L. SHANNON REVERSIBLE ROTARY PUMP 2 Sheets-Sheet '2 Filed Nov. 15, 1946 INVENTOR. L 0)? 5775222202 ATTI'J RN EYE Patented Apr. 17, 1951 REVERSIBLE ROTARY PUMP Lon Shannon, Gold Beach, reg., assignor t0 Essaness Patents, Gold Beach, 0reg., a business trust Application November 15, 1946, Serial No. 710,151

2 Claims. (01. 103-3) My present invention relates to an improved reversible rotary pump and more particularly to a reversible type vaned impeller pump in which the direction of flow of fluid therethrough may be reversed without change in the direction of rotary movement of the impeller shaft. Generally the pump of my invention comprises a housing enclosin an adjustable impeller case which is movable vertically in the housing eccentrically of the impeller so that the vanes of the impeller direct a flow of liquid through the pump depending upon the position of the case.

In the accompanying drawings I have illustrated one complete example of the physical embodiment :of my invention according to the best mode I have thus far devised but it will be understood that various changes'and alterations may be made in the exemplified structure within the scope of the appended claims.

Inthe drawings:

Figure 1 is a side elevational v'iewof the pump of my invention shown operably connected with a motor.

Figure 2 is a top plan view of the pump.

Figure 3 is a vertical sectional view through the pump.

Figure 4 is a horizontal sectional view of the pump.

Figure 5 is a front elevational view of the pump with the cover removed the vanes being positioned for flow of liquid from left to right.

Figure 6 is a front elevational view of the pump with the cover and impeller removed.

Figure 7 is a view similar to Figure 5 but with the vanes positioned for flow from right to left.

Figure 8 is a similar view with the vanes in neutral or inoperative condition.

Figure 9 is a vertical sectional view through the housing.

Referring now to the drawings in detail I have illustrated the pump of my invention as operated by a motor 2 through shaft 4 and coupling 6 to pump shaft 8. A flange I ll enclosing packing 12 receives packing nut I4 and the shaft 8 is supported in the bearing IS in the housing 18. This housing is provided with passages and 22 for the pipes 24 and 26 respectively. The housing is supported upon the base 28, and a rin 30 forming a pump housing in which a rotor chamber is provided is secured to the front of the housing by bolts 32.

A cover plate 33 for the ring may be secured by bolts 35. Within the housing and cover 1 provide a floating adjustable rotor case 36 having a cylindrical central opening 38 and within this opening I utilize an impeller or rotor 40 secured on shaft 8 and formed with radial slots 42 to receive the vanes or blades 44.

The lower inner surface 3| of the pump housing or ring 30 is described 'on a radius the center of which corresponds with the center of the rotor and also with the center of the shaft 8 on which the rotor is mounted, and the lower end 31 of the floating rotor case 36 is formed on a similar radius taken from the same center, wherein the lower end of the case 36 nests against the innersurface of the lower end of the housing 30. The upper inner surface 33 of the housing 30 is formed to represent the upper half of ahexagon and a corresponding surface 35 is provided on the floating case 36 so that the upper end of the case nests in the upper end of the housing with the case 36 in the upper position whereby the inner floating rotor case 36 is rigidly held in both the upper and lower positions.

This rotor is of substantially less diameter than the opening in the case to permit the vertical adjustment of the case with relation to the rotor so that the vanes will be confined and released at opposite sides of the rotor depending upon the eccentric position of the case with relation to the center of the rotor.

To effect adjustment of the case I employ a rod 46 connected with the case and extending through a bracket 48 supported by bolts 50, and a standard 52 is provided for the lever 54 which is pivotally connected to the standard at 5B and to the rod at 58.

Thus with the shaft!) rotating clockwise and the rotor case raised as seen in Figure 5 the flow of liquid will be from left to right in the port 20 and out the port 22.

However with the rotor case lowered to the position of Figure 7 the direction of rotation of the shaft Band the rotor being clockwise, the direction of flow will be reversed or from right to left, in port 22 and out port 20.

Thus by the simple structure above described the direction of flow of a unidirectional pump may be reversed by elevation or lowering of the lever'54-and the case 36 eccentric of the shaft and the rotor. With the case in the position seen in Figure 8, the rotor will be neutral and inoperative to impart movement to the fluid.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a rotary pump of the reversible type, the combination which comprises a pump housing surface of said rotor case having fiatasurfaces.

forming part of a hexagon corresponding to and nesting in the upper end of the rotor-ichambe'r with the case in the uppermost position; and the lower surface of said rotor case also being arouate and described on a radius corresponding --to the radius of the lower end of the rotor chamber and nested therein with the rotor case in the lower-" most position, said rotor case having a cylindrical opening therethrough in 'whichv'the' -rotoris-' positioned; 'saidfpumphousing having inlet. and dscharge connections with the inner ends thereof:

communicating with the pump chamber on op- 1 posite'sides of the-center thereof, a cover plate enclosingisaid rotor chamber, and means shift-- ing the position of the -saidirotor case from the exterior of the pump housing? 2. In alrotary pump of the reversible type,- the combination which. comprises a pump housinghavinga pumpirotor'chamber therein, 'a rotor:

in said chamberfhaving blades slidably mounted in radially disposed slots the'rein, said chamber having parallel vertically disposed sides, a fiat upper surface normal to the vertically disposed sides, and having-diagonally positioned sides forming the upper side of a hexagon, and-the -i lower side 'of said chamber being arcuate-and formed on a radius from the'center of the' rotor,

a floating:rotor case-positioned in said rotor chamber and vertically slidable therein, the upper surface of said rotor case having fiat surfaces forming part of a hexagon corresponding to and nesting in the upper end of the rotor chamber with the case in the uppermost position, and the lower surface of said rotor case also being arcuate and described on a radius corresponding to the radius of the lower end of the rotor chamber and nested therein with-,zthe rotor case in the lowermost position, said rotor case having a cylindrical opening therethrough in which the rotor: is positioned, said pump housing having inletand discharge connections with the inner ends"thereof communicating With the pump chamberzon opposite sides of the center there- -"of,'.-:-a"coveruplate:enclosing said rotor chamber, a hand lever pivotal-1y mounted on the upper end oflthe said pump housing, and a rod connecting the said hand levert'o the rotor case, said inlet a-nddischarge connections of the pump housing communicating with the rotor chamber versed.

LON SHANNON.

REFERENCES .CITED The-following references are-of record inthe file 'of thispatent:

UNITED STATES PATENTS 1'3 Number Naf'ne 7 Date,

550,466" Westinghouse NOV. 26,1895." 1,160,032 Allan' NOV. 9,1915 2,166,423 Clark; ,J.uly18,'l939-- 2423.271

, Talbot ,July ,1, 1947 

